Cisco History: How the 1986 AGS Router Helped Turn Internetworking Into a Business

Cisco was founded in 1984 by Stanford computer technologists Len Bosack and Sandy Lerner around a problem universities were encountering as computer networks multiplied: different local networks and protocols needed to communicate with one another. The company’s early achievement was not inventing the internet, but commercialising multiprotocol routing in a way organisations could deploy beyond research environments.

Cisco’s Advanced Gateway Server, introduced in 1986, became its first major shipped router platform. Cisco engineer Kirk Lougheed has recalled building and testing some of the first routers in the founders’ house before taking them to UPS for shipment. He said early customers included universities and HP. Those details give the startup story a practical scale: the early company was assembling small batches for institutions that already understood why internetworking mattered.

How the 1986 AGS Router Helped Turn Internetworking Into a Business

The consequence was enormous because the market expanded around Cisco’s core problem. As organisations connected more local networks and the public internet grew, routers moved from specialist academic equipment into critical business infrastructure. Cisco’s software, later known as IOS, became as important as the hardware because routing protocols, configuration and network services determined how the boxes behaved.

Cisco expanded through both internal development and acquisitions into switching, security, wireless networking, collaboration and data-centre systems. The company’s position shifted from selling routers that joined disparate networks to supplying a much larger portion of enterprise communications infrastructure. That expansion followed the network as it absorbed voice, video, applications and security.

Cisco today

Cisco remains an independent public networking company, but its software and security footprint is much larger than the router business that established it. The completed 2024 acquisition of Splunk added a major observability and security-data platform to routing, switching, wireless, collaboration and security products.

The AGS remains the right early anchor because it demonstrates what Cisco actually contributed at the start: a practical way to move traffic between different network environments. Modern Cisco is much broader, but the company is still fundamentally concerned with how systems connect, exchange information and are managed securely. The 1984 founding and 1986 product therefore explain the architecture of the later business better than a generic account of “technology growth” ever could.